13. which expression is the simplest form of (a^1/3b^-1/4)^-12?

Does anyone know how to do geometryme with this problem

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12